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Hyemin Choi

on 13 February 2013

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Baloloy, Maria
Choi, Hyemin
Perez, Aya
Reyes, Carinna

III-Service The Study on Cassava Leaves extract
As an Alternative Acid-Base Indicator Chapter 1: Introduction That In All Things,
God May Be Glorified!!!

*Acid-base indicator = weak base or weak acid
*Cassava leaf contains Hydrocyanic Acid (weak acid)

Cassava Leaves, being one of the common
Plants in the Philippines contain Hydrocyanic
Acid that gives color changes to Acidic
and Basic solutions.
Producing Cassava Leaf Extraction Chapter 3: Methodology 1) Cassava leaf do not have the ability to indicate acidity or
basicity of a particular substance.

2) There are no distinct color changes between the Cassava
leaf extract mixed with acidic materials and with basic materials. Chapter 5: Conclusion 1) Perform the experiment at least twice or more to secure the data achieved in the experiment.

2) Allot few minutes for the substances to wholly react to the Cassava leaf extract.

3) Avoid using solid materials to test the Cassava leaf extract

4) Avoid using colored substances to test the Cassava leaf extract Chapter 5: Recommendation Background of the study Cassava Leaf Litmus Paper Chapter 1:
Statement of the Problem 1) Does Cassava Leaf Extract have the ability to
indicate the basicity/acidity of a particular substance?

2) Will there be a difference in color changes depending
on the acidic or basic substances? This study aims to find answers on the following problems: Chapter 4: Results and
Discussion Chapter 5: Summary Chapter 1: Introduction
Cassava Leaves, being one of the common
Plants in the Philippines have Hydrocyanic
Acid that gives sensitive reaction to Acidic
and Basic solutions.

Instead of producing equipments that spend
other limited resources, using the most available
local natural resources can bring up the economy
and help the future researchers for further
studies. Background of the study Chapter 1: Significance Hypothesis 1) Yes, because of its presence of
Hydrocyanic acid (weak base).

2) Yes, because Hydrocyanic acid
give color changes in result to
its contact to acid/base. *Common local resources as an alternative for acid-base indicator

*Prevent the wastage of local sources (Cassava leaves in particular)

*Further reference for the future researchers Material List · 10 test tubes
· 5 ml Ammonia
· Medicine Dropper
· 5 ml Natural Orange Juice
· Mortar and Pestle
· 5 ml Coke
· 5 ml Vinegar
· 5 ml Liquid Soap
· 5 ml Muriatic Acid
· 5 g Baking Powder
· 10 g of Cassava Leaves
· 5 g Toothpaste
· 5 g Salt Testing Cassava Leaf Extraction as an
acid-base indicator Record the Observation Preparing of the materials Preparing Grinding Filtration Result *The Cassava Leaf Extract is not a good
alternative as an acid-base indicator,
because the color changes of both acidic
and basic substances are similar. Through the experiment... After the experiment, we conclude that... Independent Variable
Ability of Cassava Leaf Extract to change
the color of the acids/bases

Dependent Variable
Changing of Color of the Acids/Bases

Constant Variables
Amount of acids,Amount of bases, Amount of
Cassava Leaf Extract, Container, Temperature Variables
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